Tests determining an oil’s propensity to form sediments on mechanical parts of the engine, for example, the compressor housing or its influence on the wear of lubricated elements, for example the camshaft or the driveshaft. Elements tested can be weighed (weight gained – sediments formed; or weight lost – material wear), subjected to both visual analyses and meteorological measurements, before and after the test. Oil validation tests, for example, durability tests (test duration approx. 1000 h), cold start, efficiency of the lubricating system, allow all engine components whose durability is influenced by the engine oil to be tested. For modern turbocharged engines, often oil validation tests are performed by determining the quantity of sediments formed on the compressor housing and their influence on engine parameters. Requirements of oil characteristics are the temperature rise of the boost air and sediment formation on the compressor. Sediments on the compressor heavily influence its efficiency and durability, both raising the temperature of the boost air and lowering the efficiency of the entire engine.